<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>404</title>
    <style>
        #body {
            height: 100%;
            width: auto;
            background-color: #3a8ee6;
            margin: 0;
            padding: 0;
        }

    </style>

</head>
<body id="body">
<h1 style="text-align: center">访问的资源不存在！</h1>
</body>
</html>